code: def __init__(self, nodes):
      self.nodes = nodes
  
file_path: catboost/contrib/python/pythran/pythran/optimizations/forward_substitution.py
imports: from pythran.analyses import LazynessAnalysis, UseDefChains, DefUseChains
  from pythran.analyses import Literals, Ancestors, Identifiers, CFG, IsAssigned
  from pythran.passmanager import Transformation
  import pythran.graph
  from collections import defaultdict
  import gast
label_desc: Use image node_id 1 to create a new Remover object from inherited base classes: ast with example: obj = Remover(nodes)